<template>
  <div>
    <!--    面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

<!--    卡片视图-->
    <el-card>
<!--      头部的警告区-->
      <el-alert
              title="注意：只允许为第三级分类的设置相关参数！"
              type="warning"
              :closable="false"
              show-icon
      >
      </el-alert>

<!--      选择商品分类区-->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类</span>
<!--          选择商品分类的级联选择框-->
          <el-cascader
                  v-model="selectedCateKeys"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange"></el-cascader>
        </el-col>
      </el-row>

<!--      tabs的标签显示-->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
<!--        添加动态参数的面板-->
        <el-tab-pane label="动态参数" name="many">
<!--          添加参数的按钮-->
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
<!--          动态的参数表格-->
          <el-table :data="manyTableData" border stripe>
            <!--            展开行-->
            <el-table-column type="expand">
              <template slot-scope="scope">
<!--                循环渲染tag标签-->
                <el-tag v-for="(item,index) in scope.row.attr_vals" :key="index" closable @close="handleClose(index,scope.row)">{{item}}</el-tag>
<!--                输入文本框-->
                <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
<!--                添加按钮-->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
<!--        添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
<!--          添加属性的按钮-->
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
<!--          静态属性的表格-->
          <el-table :data="onlyTableData" border stripe>
<!--            展开行-->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!--                循环渲染tag标签-->
                <el-tag v-for="(item,index) in scope.row.attr_vals" :key="index" closable @close="handleClose(index,scope.row)">{{item}}</el-tag>
                <!--                输入文本框-->
                <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!--                添加按钮-->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
<!--    修改参数的对话框-->
    <el-dialog
            :title="'修改'+titleText"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed"
    >
<!--      修改参数的对话框-->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="showEditDialog = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
    </el-dialog>

    <!--    添加参数的对话框-->
    <el-dialog
            :title="'添加'+titleText"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed"
    >
      <!--      添加参数的对话框-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: "params",
    data(){
      return{
        cateList:[],
        cateProps:{
          expandTrigger: 'hover',
          value:'cat_id',
          label:'cat_name',
          children:'children'
        },
        //获取的所选择的value id值
        selectedCateKeys:[],
      //  被激活的页签名称这个就是面板的name
        activeName:'many',
        //动态参数的数据
        manyTableData:[],
        //静态属性的参数数据
        onlyTableData:[],
        //控制添加对话框的显示与隐藏
        addDialogVisible:false,
        //添加参数的表单数据对象
        addForm:{
          attr_name:''
        },
        //添加表单的验证规则对象
        addFormRules:{
          attr_name: [
            { required: true, message: '请输入活动名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ]
        },
        //控制修改对话框的显示与隐藏
        editDialogVisible:false,
        //修改参数的表单数据对象
        editForm:{

        },
        //修改表单的验证规则对象
        editFormRules:{
          attr_name: [
            { required: true, message: '请输入活动名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ]
        },

      }
    },
    created() {
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res} = await this.$http.get('categories')
        if(res.meta.status !== 200) return this.$message.error('获取商品分类失败')
        //把数据列表复制给catelist
        this.cateList = res.data
        console.log(this.cateList)
      },
      //级联选择框发生改变触发
      async handleChange(){
       this.getParamsData()
      },
      //这是tab的点击事件的处理函数
      handleTabClick(){
        this.getParamsData()
        console.log(this.activeName)
      },
      async getParamsData(){
        //选择的不是3级分类
        if(this.selectedCateKeys.length !== 3){
          this.selectedCateKeys = []
          this.manyTableData = []
          this.onlyTableData = []
          return
        }
        //  根据所选择的Id，和当前的面板来获取参数
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
        if(res.meta.status !== 200) return this.$message.error('获取商品数据失败')
        //字符串转为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        //  控制文本框的显示与隐藏
          item.inputVisible = false
          item.inputValue = ''
        })
        console.log(res.data)
        if(this.activeName === 'many') {
          this.manyTableData = res.data
        }else{
          this.onlyTableData = res.data
        }
      },
      //监听添加对话框的关闭事件
      addDialogClosed(){
        this.$refs.addFormRef.resetFields()
      },
      //监听修改对话框的关闭事件
      editDialogClosed(){
        this.$refs.editFormRef.resetFields()
      },
      //点击添加参数
      addParams() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return
          const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,
              {
                attr_name: this.addForm.attr_name,
                attr_sel: this.activeName
              })
          if (res.meta.status !== 201) {
            return this.$message.error('添加失败')
          }
          this.$message.success('添加成功')
          this.addDialogVisible = false
          this.getParamsData()
        })
      },
      //点击编辑的事件
      async showEditDialog(attr_id){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{
            attr_sel:this.activeName
          }
          })
        if(res.meta.status !== 200) return this.$message.error('获取参数信息失败')
        this.editForm = res.data
        this.editDialogVisible = true
      },
      //修改参数
      editParams(){
        this.$refs.editFormRef.validate(async valid =>{
          if(!valid) return
         const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
              attr_name:this.editForm.attr_name,
              attr_sel:this.activeName
            })
          if(res.meta.status !== 200){
            this.$message.error('修改失败')
          }
          this.$message.success('修改成功')
          this.getParamsData()
          this.editDialogVisible = false
        })
      },
      async deleteParams(attr_id){
        const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
        if(res.meta.status !== 200){
          return this.$message.error('删除失败')
        }
        this.$message.success('删除成功')
        this.getParamsData()
      },
      //文本框失去焦点，或摁下了enter键
      async handleInputConfirm(row){
        if(row.inputValue.trim().length === 0){
          row.inputValue = ''
          row.inputVisible = false
          return
        }
      //  如果没有return，要后续处理
        row.attr_vals.push(
            row.inputValue.trim()
        )
        row.inputValue = ''
        row.inputVisible = false

        this.saveAttrVals(row)
      },
      showInput(row){
        //要先显示这个文本框，才能走下一步不然出现不了saveTagInput
        row.inputVisible = true
        this.$nextTick(() => {
          this.$refs.saveTagInput.$refs.input.focus()
        })
      },
      //删除对应的标签
      handleClose(index,row){
        row.attr_vals.splice(index,1)
        this.saveAttrVals(row)
      },
      //保存attr_vals
      async saveAttrVals(row){
        //需要发起请求保存数据
        const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
          attr_sel:this.activeName,
          attr_name:row.attr_name,
          //这个是数组每项的拼接
          attr_vals:row.attr_vals.join(' ')
        })
        if(res.meta.status !== 200) {
          return this.$message.error('修改参数项失败')
        }
        this.$message.success('修改参数项成功')
      }
    },
    computed:{
      //如果长度为3就禁用，否则就启动按钮
      isBtnDisabled(){
        if(this.selectedCateKeys.length !== 3){
          return true
        }
        return false
      },
      //当前选中的三级分类的id
      cateId(){
        if(this.selectedCateKeys.length === 3){
          return this.selectedCateKeys[2]
        }
        return null
      },
      //动态选择对话框的标题
      titleText(){
        if(this.activeName === 'many'){
          return '动态参数'
        }else {
          return '静态属性'
        }
      }
    },
  }
</script>

<style lang="less" scoped>
.cat_opt{
  margin: 15px 0px;
}
.el-tag{
    margin: 10px;
  }
.input-new-tag{
  width: 120px;
}
</style>